WebCethrene gives a well-resolved EPR spectrum at room temperature and its structure was confirmed by 2D NMR and absorption spectroscopies. Our experiments and calculations show that the helical ... WebMar 19, 2024 · We demonstrate that the electrocyclic (EC) ring-closure of cethrene in solution proceeds in a conrotatory mode both thermally and photochemically. The facile …
Cethrene: A Helically Chiral Biradicaloid Isomer of …
WebThe facile photochemical EC process promises that cethrene can serve as an efficient chiroptical switch operated solely by light. As for the thermally activated EC reaction, a … WebThe facile photochemical EC process promises that cethrene can serve as an efficient chiroptical switch operated solely by light. As for the thermally activated EC reaction, a low reaction barrier and a solvation effect on the EC rate indicate that the C 2-symmetric pathway predicted by DFT calculations might not be the correct mechanism ... the tage mahal
Zhongyu MOU PostDoc Position Oak Ridge National …
WebAug 1, 2024 · We describe the synthesis and properties of 13,14-dimethylcethrene, a prototype of a chiral diradicaloid photochemical switch that can be transformed reversibly via conrotatory electrocyclization to its more stable closed form by light (630 nm) or heat and back to its open form by light (365 nm). WebUsing a dimethyl derivative of cethrene, in which the methyl groups prevent the oxidation to a flat hydrocarbon as observed for parent cethrene (Scheme 1, middle), we … WebWe demonstrate that the electrocyclic (EC) ring-closure of cethrene in solution proceeds in a conrotatory mode both thermally and photochemically. The facile photochemical EC process promises that cethrene could serve as an efficient chiroptical switch operated solely by light. As for the thermally activated EC reaction, a low reaction barrier ... the tag factory